<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>用户管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区 -->
    <el-card>
      <!-- 搜索与添加区 -->
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input
            placeholder="请输入内容"
            v-model="queryInfo.query"
            clearable
            @clear="getUserList"
          >
            <el-button
              slot="append"
              icon="el-icon-search"
              @click="getUserList"
            ></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="addDialogVisible = true"
            >添加用户</el-button
          >
        </el-col>
      </el-row>

      <!-- 用户列表区 -->
      <el-row>
        <el-table :data="usersList" style="width: 100%" border stripe>
          <el-table-column type="index"></el-table-column>
          <el-table-column prop="username" label="姓名"></el-table-column>
          <el-table-column prop="email" label="邮箱"></el-table-column>
          <el-table-column prop="mobile" label="电话"></el-table-column>
          <el-table-column prop="role_name" label="角色"></el-table-column>
          <el-table-column label="状态">
            <template slot-scope="scope">
              <el-switch
                v-model="scope.row.mg_state"
                @change="userStateChange(scope.row)"
              ></el-switch>
            </template>
          </el-table-column>
          <el-table-column label="操作" width="180px">
            <template slot-scope="scope">
              <!-- 修改按钮 -->
              <el-button
                type="primary"
                icon="el-icon-edit"
                size="mini"
                @click="showEditDialog(scope.row.id)"
              ></el-button>
              <!-- 删除按钮 -->
              <el-button
                type="danger"
                icon="el-icon-delete"
                size="mini"
                @click="removeUserById(scope.row.id)"
              ></el-button>
              <!-- 分配角色按钮 -->
              <el-tooltip
                effect="dark"
                content="分配角色"
                placement="top"
                :enterable="false"
              >
                <el-button
                  type="warning"
                  icon="el-icon-setting"
                  size="mini"
                  @click="showRoleDialogVisible(scope.row)"
                ></el-button>
              </el-tooltip>
            </template>
          </el-table-column>
        </el-table>
      </el-row>

      <!-- 分页区 -->
      <el-row>
        <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="queryInfo.pagenum"
          :page-sizes="[1, 2, 5, 10]"
          :page-size="queryInfo.pagesize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total"
        ></el-pagination>
      </el-row>
    </el-card>

    <!-- 添加用户对话框 -->
    <el-dialog
      title="添加用户"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClose"
    >
      <!-- 内容主体区域 -->
      <el-form
        :model="addFrom"
        :rules="addFromRules"
        ref="addFromRef"
        label-width="70px"
      >
        <el-form-item label="用户名" prop="username">
          <el-input v-model="addFrom.username"></el-input>
        </el-form-item>
        <el-form-item label="密  码" prop="password">
          <el-input v-model="addFrom.password"></el-input>
        </el-form-item>
        <el-form-item label="邮  箱" prop="email">
          <el-input v-model="addFrom.email"></el-input>
        </el-form-item>
        <el-form-item label="手  机" prop="mobile">
          <el-input v-model="addFrom.mobile"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部按钮区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUserBtn">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改用户对话框 -->
    <el-dialog
      title="修改用户"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClose"
    >
      <!-- 内容主体区域 -->
      <el-form
        :model="editFrom"
        :rules="editFromRules"
        ref="editFromRef"
        label-width="70px"
      >
        <el-form-item label="用户名">
          <el-input v-model="editFrom.username" :disabled="true"></el-input>
        </el-form-item>
        <el-form-item label="电话" prop="mobile">
          <el-input v-model="editFrom.mobile"></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="editFrom.email"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部按钮区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配角色对话框 -->
    <el-dialog
      title="分配角色"
      :visible.sync="setRoleDialogVisible"
      width="30%"
      @close="setRoleDialogClosed"
    >
      <div>
        <p>当前的用户: {{ userInfo.username }}</p>
        <p>当前的角色: {{ userInfo.role_name }}</p>
        <p>
          分配角色:
          <el-select v-model="selectRoleId" placeholder="请选择">
            <el-option
              v-for="item in rolesList"
              :key="item.id"
              :label="item.roleName"
              :value="item.id"
            >
            </el-option>
          </el-select>
        </p>
      </div>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 获取用户列表的参数对象
      queryInfo: {
        query: '',
        // 当前的页数
        pagenum: 1,
        // 当前每页显示几条数据
        pagesize: 2
      },
      usersList: [],
      total: 0,
      // 切换添加用户对话框显示隐藏
      addDialogVisible: false,
      // 添加用户的表单数据
      addFrom: {
        username: '',
        password: '',
        email: '',
        mobile: ''
      },
      // 添加表单验证规则对象
      addFromRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '用户名长度在3~10个字符之间',
            trigger: 'blur'
          }
        ],
        password: [
          { required: true, message: '请输入用户密码', trigger: 'blur' },
          {
            min: 6,
            max: 15,
            message: '用户名长度在6~15个字符之间',
            trigger: 'blur'
          }
        ],
        email: [{ required: true, message: '请输入用户邮箱', trigger: 'blur' }],
        mobile: [
          { required: true, message: '请输入用户手机号', trigger: 'blur' }
        ]
      },
      // 切换修改用户对话框显示隐藏
      editDialogVisible: false,
      // 查询到的用户信息对象
      editFrom: {},
      // 修改用户信息的验证规则
      editFromRules: {
        mobile: [
          { required: true, message: '请输入用户手机号', trigger: 'blur' }
        ],
        email: [{ required: true, message: '请输入用户邮箱', trigger: 'blur' }]
      },
      // 控制分配角色对话框
      setRoleDialogVisible: false,
      // 获取当前用户数据
      userInfo: '',
      // 所有角色的数据列表
      rolesList: [],
      // 已选中的角色ID
      selectRoleId: ''
    }
  },
  created() {
    this.getUserList()
  },
  methods: {
    async getUserList() {
      const { data: res } = await this.$http.get('users', {
        params: this.queryInfo
      })
      this.usersList = res.data.users
      this.total = res.data.total
    },
    // 监听 pageSize 事件
    handleSizeChange(newPage) {
      // 修改当前页面要显示几条数据
      this.queryInfo.pagesize = newPage
      // 从新发送请求获取数据
      this.getUserList()
    },
    // 监听 页码值 改变的事件
    handleCurrentChange(newPage) {
      // 当页码改变的时候
      this.queryInfo.pagenum = newPage
      this.getUserList()
    },
    // 监听 switch 开关的状态变化 事件
    async userStateChange(userInfo) {
      const { data: res } = await this.$http.put(
        `users/${userInfo.id}/state/${userInfo.mg_state}`
      )
      if (res.meta.status !== 200) {
        userInfo.mg_state = !userInfo.mg_state
        return this.$message.error('更新用户状态失败!')
      }
      this.$message.success('更新用户状态成功!')
    },
    async showEditDialog(id) {
      const { data: res } = await this.$http.get('users/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败!')
      }
      this.editFrom = res.data
      this.editDialogVisible = true
    },
    // 监听添加用户对话框的关闭事件
    addDialogClose: function() {
      this.$refs.addFromRef.resetFields()
    },
    // 监听修改用户对话框的关闭事件
    editDialogClose: function() {
      this.$refs.editFromRef.resetFields()
    },
    editUserInfo: function() {
      this.$refs.editFromRef.validate(async valid => {
        if (!valid) {
          return false
        }
        // 发起修改用户信息的数据请求
        const { data: res } = await this.$http.put(
          'users/' + this.editFrom.id,
          {
            email: this.editFrom.email,
            mobile: this.editFrom.mobile
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('修改用户信息失败!')
        }
        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getUserList()
        // 提示修改成功
        this.$message.success('修改用户信息成功!')
      })
    },
    // 根据id 删除用户
    async removeUserById(id) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该用户, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      // 如果用户确认删除, 返回字符串confirm
      // 如果用户取消删除, 返回字符串cancel
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消删除!')
      }
      const { data: res } = await this.$http.delete('users/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败!')
      }
      // 提示删除成功
      this.$message.success('删除用户成功!')
      // 用总数据 total 模 每页显示数据条数 如果余1 代表当前页只剩一条数据,
      // 再发送请求之前, 将请求的页码减一
      if (this.total % this.queryInfo.pagesize === 1) {
        this.queryInfo.pagenum = this.queryInfo.pagenum - 1
      }
      // 刷新数据列表
      this.getUserList()
    },
    async addUserBtn() {
      const { data: res } = await this.$http.post('users', this.addFrom)
      if (res.meta.status !== 201) {
        return this.$message.error('添加用户失败!')
      }
      // 关闭对话框
      this.addDialogVisible = false
      // 提示添加用户成功
      this.$message.success('添加用户成功!')
      // 刷新数据列表
      this.getUserList()
    },
    // 控制分配角色对话框的显示隐藏
    async showRoleDialogVisible(userInfo) {
      this.userInfo = userInfo
      // 在展示对话框之前,获取所有角色列表
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败!')
      }
      this.rolesList = res.data
      this.setRoleDialogVisible = true
    },
    // 点击按钮分配角色
    async saveRoleInfo() {
      if (!this.selectRoleId) {
        return this.$message.error('请选择要分配的角色')
      }
      // 调接口
      const { data: res } = await this.$http.put(
        `users/${this.userInfo.id}/role`,
        {
          rid: this.selectRoleId
        }
      )
      // 判断响应状态
      if (res.meta.status === 400) {
        return this.$message.error('不允许修改admin账户!')
      }
      if (res.meta.status !== 200) {
        return this.$message.error('更新角色权限失败!')
      }
      // 提示用户更新成功
      this.$message.success('更新角色权限成功!')
      // 刷新页面
      this.getUserList()
      // 关闭分配角色对话框
      this.setRoleDialogVisible = false
    },
    // 关闭分配角色对话框,重置表单
    setRoleDialogClosed() {
      this.selectRoleId = ''
      this.editUserInfo = {}
    }
  }
}
</script>

<style lang="less" scoped></style>
